Pump



March 20, 1962 H. P. PAIKERT PUMP Filed Aug. 14,, 1958 INVENTOR. fli fMATTORNEY.

Filed Aug. 14, 1958, $91. No. 754,986 1 Claim. 01. 103-132 The presentinvention relates generally, as hereinafter set forth, to a hermeticallysealed pump.

Thus it is a primary object of this invention to provide a pump of theabove mentioned type, which has the prime mover outside and independentof the pump itself, and not, as now commonly used, arranged within thepumphousing.

To accomplish the above this invention comprises the featureshereinafter described and claimed, as the description and drawing setforth in detail certain improvements relative to the invention.

With the above and other objects in view, this invention consists of thenovel features of construction, combination and arrangement of parts,hereinafter fully described, claimed and illustrated in the accompanyingdrawing, forming part of this specification, and in which similarcharacters of reference indicate corresponding parts in all views, andin which:

FIGURE 1 is a perspective view of the invention with parts broken off.

FIGURE 2 is a cross sectional view.

FIGURE 3 is a similar view.

Referring more particularly to the drawing a fixed housing having acylindrical fluid space 11 is provided with a cylindrical displacingrotor or cam 12 of smaller diameter than that of the spac 11. The cam imounted for oscillation within the space 11 on an eccentric or crank 14on a rotary shaft 15 so that as the shaft is rotated, a line of tangencybetween the cam rotor 12 and the inner wall 13 of the housing moves in asubstantially cylindrical path.

The rotor is provided with a lip or longitudinal fin 16 slid'ably heldbetween two half round rods 17 and 18 which turn in housing recesses 19axially parallel with the rotor. The housing is provided with intake andexit channels 22 and 24 communicating with the space 11 on oppositesides of the lip 16 and above the rotor.

The description thus far is applicable to known pumps.

The improvements of my invention consist of a balloonlike cover orclosure 28 of flexible or yieldable material, such as rubber, Bellowsmetal or plastic material arranged fluid-tight over the ends 29 of thepump housing and fastened to the rotor 12 by two inner and outer plates30 and 32 on one end of the rotor and similarly by plates 34 and 36 onthe opposite end; the ends 37 of the flexible cover 28 being fastenedbetween the respective pairs of plates; and the inner plates engagingfluid-tight over the housing ends 29.

On the outside of the housing 10 is a screw-threaded 3,025,801 PatentedMar. 20, 1962 See clamp 38 having a flange 40 which holds the cover 28in place.

As shown, the respective ends of the rotor and housing are co-planar.

Fittings 41 and 43 on the housing, and projecting fluidtight through thecover 28, are provided for the exit and inlet channels. Valving for thechannels may be provided such as shown by the check valve 42 for theexit.

In operation, the inner plates 30 and 34 wipe fluidtight against thehousing ends 29 and the half rod ends as the rotor oscillates. Themarginal portions or ends 37 of the cover 28 move with the rotor andplates so that the bulges 44 of the cover travel with the rotor and in amore or less circular motion. The cover being firmly held between theplates permits no leakage and effectively seals the working part offfrom the exterior.

It is obvious that change may be made in the form, construction andarrangement of the several parts, as shown, within the scope of theappended claims, without departing from the spirit of the invention, andI do not, therefore, wish to limit myself to the exact constructionshown and described herein.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is:

In combination, a pump body having a substantially cylindrical chamberand a substantially cylindrical displacement member mounted forplanetary movement therein, the body and member having parallel axes andopposite coplanar ends, plates fast on th ends of the member andoverlapping the body ends and slidable thereon approximately fiuidtight, a bag-like closure of flexible fluid-tight material covering thebody and having marginal portions over the outer faces of said plates,and clamping plates secured fast to the displacement member adjacent thefirst mentioned plates and holding the said marginal portions of thecover fluid-tight against the first mentioned plates to exclude leakageof fluid passing between the first mentioned plates and body from thegenerally ambient Zones open to th atmosphere.

References Cited in the file of this patent UNITED STATES PATENTS569,350 Potter Oct. 13, 1896 1,780,109 Berglund Oct. 28, 1930 1,906,142Ekelof Apr. 25, 1933 2,133,358 McCormack Oct. 18, 1938 2,351,050 KareyJune 13, 1944 2,545,604 Byram Mar. 20, 1951 2,585,949 MacCormack M Feb.19, 1952 2,849,962 Musser Sept. 2, 1958 2,915,979 Bourke et a1. Dec. 8,1959 FOREIGN PATENTS 647,172 Germany June 29, 1937 678,936 Germany July25, 1939

